Fixes for cygwin and mingw builds.

src/Demos/osgcluster/broadcaster.cpp

@@ -19,6 +19,8 @@
 #  include <sys/sockio.h>
 #elif defined(__sgi)
 #  include <net/soioctl.h>
+#elif defined(__CYGWIN__)
+// nothing needed
 #else
 #  error Teach me how to build on this system
 #endif

src/osg/GLExtensions.cpp

@@ -1,4 +1,4 @@
-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(WIN32)
 #include <windows.h>
 #elif !defined macintosh
 #include <dlfcn.h>
@@ -60,7 +60,7 @@ const bool osg::isGLExtensionSupported(const char *extension)
 
 void* osg::getGLExtensionFuncPtr(const char *funcName)
 {
-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(WIN32)
    return wglGetProcAddress(funcName);
 #elif defined(macintosh)
    return NULL;

src/osgDB/FileUtils.cpp

@@ -347,7 +347,7 @@ std::string osgDB::findFileInDirectory(const std::string& fileName,const std::st
 }
 
 
-#if defined(WIN32) &&!defined(__CYGWIN__)
+#if defined(WIN32) && !defined(__CYGWIN__)
 
 #include <io.h>
 #include <direct.h>

src/osgPlugins/flt/flt.h

@@ -6,7 +6,7 @@
 
 #include <iostream>
 
-#ifdef __CYGWIN__
+#if defined(__CYGWIN__) || defined(__MINGW32__)
 #include <sys/types.h>
 #endif